Gamma scanning technique based on equivalent plane source method in large container

参数名称 Parameter	参数值
探测器类型 Detector type	HPGe
晶体直径 Crystal diameter / mm	6.09
晶体长度 Crystal length / mm	5.18
冷指直径 Cold finger diameter / mm	0.87
冷指长度 Cold finger length / mm	3.82
死层厚度Dead layer thickness / mm	0.07
真空层厚度 Vacuum layer thickness / mm	0.50
铝壳厚度 Aluminum shell thickness / mm	0.15

Table 2. Equivalent plane source method calculation results

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Table 2. Equivalent plane source method calculation results

介质密度 Density / g·cm^-3	真实位置 Real position / cm	等效面源计算结果 Equivalent plane source	误差 Error / cm
1.0	0.0	3.1	3.1
	10.0	10.7	0.7
	20.0	20.5	0.5
	30.0	31.7	1.7
	40.0	39.2	-0.8
	50.0	47.4	-2.6
	60.0	55.2	-4.8
	70.0	69.7	-0.3
	80.0	76.0	-4.0
	90.0	83.0	-7.0
2.6	0.0	-0.6	-0.6
	10.0	7.2	-2.8
	20.0	16.7	-3.3
	30.0	29.1	-0.9
	40.0	41.5	1.5
	50.0	48.0	-2.0
	60.0	57.7	-2.3
	70.0	69.3	-0.7
	80.0	78.8	-1.2
	90.0	86.3	-3.7

Table 3. Volume source simulation results

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Table 3. Volume source simulation results

工况 Operating conditions	X₁ / cm	X₂ / cm	I_measured/I_true ITGS	I_measured/I_true TGS
-90~90 cm	86.1	88.62	1.612	0.001
-0~90 cm	86.0	10.61	1.694	0.045
-90~0 cm	1.15	88.63	1.262	0.359
-70~70 cm	68.7	69.10	1.238	0.003
0~70 cm	68.6	1.43	1.073	0.004
-70~0 cm	4.02	69.04	1.287	0.044
-50~50 cm	50.4	49.75	0.755	0.564
0~50 cm	50.5	3.03	0.688	1.949
-50~0 cm	0.54	49.71	0.763	1.334

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Li XU, Weiguo GU, Hui YANG, Dezhong WANG. Gamma scanning technique based on equivalent plane source method in large container[J]. NUCLEAR TECHNIQUES, 2025, 48(2): 020204

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